public void Archive(Stream outputStream, ProtectedKey keyToBeArchived, string passphrase)
{
byte[] bytes = BitConverter.GetBytes(0x10e1);
byte[] salt = this.GenerateSalt();
byte[] buffer = this.GetEncryptedKey(keyToBeArchived, passphrase, salt);
outputStream.Write(bytes, 0, bytes.Length);
outputStream.Write(salt, 0, salt.Length);
outputStream.Write(buffer, 0, buffer.Length);
}
public SymmetricAlgorithmProvider(Type algorithmType, ProtectedKey key)
{
if (algorithmType == null)
{
throw new ArgumentNullException("algorithmType");
}
if (!typeof(SymmetricAlgorithm).IsAssignableFrom(algorithmType))
{
throw new ArgumentException("The type must be of type SymmetricAlgorithm.", "algorithmType");
}
this.algorithmType = algorithmType;
this.key = key;
}
byte[] GetEncryptedKey(ProtectedKey keyToBeArchived, string passphrase, byte[] salt)
{
byte[] buffer2;
byte[] decryptedKey = keyToBeArchived.DecryptedKey;
try
{
buffer2 = this.EncryptKeyForArchival(decryptedKey, passphrase, salt);
}
finally
{
CryptographyUtility.ZeroOutBytes(decryptedKey);
}
return buffer2;
}
byte[] GetEncryptedKey(ProtectedKey keyToBeArchived, string passphrase, byte[] salt)
{
byte[] buffer2;
byte[] decryptedKey = keyToBeArchived.DecryptedKey;
try
{
buffer2 = this.EncryptKeyForArchival(decryptedKey, passphrase, salt);
}
finally
{
CryptographyUtility.ZeroOutBytes(decryptedKey);
}
return(buffer2);
}
public SymmetricCryptographer(Type algorithmType, ProtectedKey key)
{
if (algorithmType == null)
{
throw new ArgumentNullException("algorithmType");
}
if (!typeof(SymmetricAlgorithm).IsAssignableFrom(algorithmType))
{
throw new ArgumentException("The type must be of type SymmetricAlgorithm.", "algorithmType");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
this.key = key;
this.algorithm = GetSymmetricAlgorithm(algorithmType);
}
ProtectedKey GenerateKey(SymmetricAlgorithm algorithm, DataProtectionScope dataProtectionScope)
{
ProtectedKey key;
byte[] plaintextKey = this.GenerateUnprotectedKey(algorithm);
try
{
key = ProtectedKey.CreateFromPlaintextKey(plaintextKey, dataProtectionScope);
}
finally
{
if (plaintextKey != null)
{
CryptographyUtility.ZeroOutBytes(plaintextKey);
}
}
return(key);
}
public static void ArchiveKey(Stream outputStream, ProtectedKey keyToArchive, string passphrase)
{
IKeyWriter writer = new KeyReaderWriter();
writer.Archive(outputStream, keyToArchive, passphrase);
}
public void Write(Stream outputStream, ProtectedKey key)
{
this.WriteVersionNumber(outputStream, 0x10e1);
this.WriteEncryptedKey(outputStream, key);
}
public static void Write(Stream outputStream, ProtectedKey key)
{
IKeyWriter writer = new KeyReaderWriter();
writer.Write(outputStream, key);
}
void WriteEncryptedKey(Stream outputStream, ProtectedKey key)
{
outputStream.Write(key.EncryptedKey, 0, key.EncryptedKey.Length);
}
public HashCryptographer(Type algorithmType, ProtectedKey protectedKey)
: this(algorithmType)
{
this.key = protectedKey;
}
public HashCryptographer(Type algorithmType, ProtectedKey protectedKey) : this(algorithmType)
{
this.key = protectedKey;
}
public static void Write(Stream outputStream, ProtectedKey key)
{
IKeyWriter writer = new KeyReaderWriter();
writer.Write(outputStream, key);
}
public static void ArchiveKey(Stream outputStream, ProtectedKey keyToArchive, string passphrase)
{
IKeyWriter writer = new KeyReaderWriter();
writer.Archive(outputStream, keyToArchive, passphrase);
}
public ProtectedKey Read(Stream protectedKeyStream, DataProtectionScope protectionScope)
{
this.ValidateKeyVersion(protectedKeyStream);
return(ProtectedKey.CreateFromEncryptedKey(this.ReadEncryptedKey(protectedKeyStream), protectionScope));
}
void WriteEncryptedKey(Stream outputStream, ProtectedKey key)
{
outputStream.Write(key.EncryptedKey, 0, key.EncryptedKey.Length);
}
public void Write(Stream outputStream, ProtectedKey key)
{
this.WriteVersionNumber(outputStream, 0x10e1);
this.WriteEncryptedKey(outputStream, key);
}
public static void Write(Stream outputStream, byte[] encryptedKey, DataProtectionScope dpapiProtectionScope)
{
ProtectedKey key = ProtectedKey.CreateFromEncryptedKey(encryptedKey, dpapiProtectionScope);
Write(outputStream, key);
}
